United States. Bureau of Public Roads, United States. Office of Public Roads and Rural Engineering, United States. Public Roads Administration, United States. Federal Highway Administration, United States. Federal Highway Administration. Offices of Research and Development, United States. Federal Highway Administration. Offices of Research, Development, and Technology, . . . United States. Federal Highway Administration. Office of Research, Development, and Technology. (1918). Public roads. U.S. G.P.O..
Cita Chicago Style (17a ed.)United States. Bureau of Public Roads, United States. Office of Public Roads and Rural Engineering, United States. Public Roads Administration, United States. Federal Highway Administration, United States. Federal Highway Administration. Offices of Research and Development, Development United States. Federal Highway Administration. Offices of Research, United States. Federal Highway Administration. Office of Research and Development, y Development United States. Federal Highway Administration. Office of Research. Public Roads. Washington: U.S. G.P.O., 1918.
Cita MLA (9a ed.)United States. Bureau of Public Roads, et al. Public Roads. U.S. G.P.O., 1918.